Software-Defined Radio Digital Signal Processing Library - https://liquidsdr.org
liquid-dsp is a free and open-source digital signal processing (DSP) library designed specifically for software-defined radios on embedded platforms. The aim is to provide a lightweight DSP library that does not rely on a myriad of external dependencies or proprietary and otherwise cumbersome frameworks. All signal processing elements are designed to be flexible, scalable, and dynamic, including filters, filter design, oscillators, modems, synchronizers, complex mathematical operations, and much more.
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Recent Releases
1.7.025 Feb 2025 13:41
major feature:
Version 1.7.0 includes support for the CMake build System. While the existing autotools environment will be supported for a time, This will be removed in a future release. This version also includes many changes to improve Testing coverage Across all interfaces, and make the interfaces across objects consistent. Build. Migrated to the CMake build system, including. Building examples, sandbox programs, benchmarks, autotests, and Detecting SIMD instruction extensions. Increased testing across the board including automated memory validation. With valgrind Detected and memory leaks for numerous methods and testing. Harnesses including `bessel_azpdf`, `ofdmflexframesync`, `qdsync`, `qs1dsearch`. `framesync64`, `eqrls`, and `fskdem`. Added new `LIQUID_ENOCONV` error type to identify errors where. Algorithms did not converge Added new `LIQUID_ENOIMP` error type to identify methods that are not. Yet implemented Replaced warnings with internal error handling for many existing object. Methods SONAME not set in shared library. Migrated README from markdown to re-structured text. Framing. Added more description to method definitions such as qpacketmodem and. Qdetector Dsssframe64: extended functionality to use qdsync, added standard. Methods such as copy(), added interfaces for specifying thresholds, Reduced default spreading gain Filter. Firinterp: added flush() method to run zeros through filter. Rresamp: allow for default bandwidth with an input of -1. Nco. Where frequency was being set improperly, added more. Extensive testing Improved the NCO object with VCO precision. Random. Added more extensive testing for various distributions to ensure values. Are generated properly
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